Electric incubator



May 10, 1949. J. w, NAPIER 2,470,046

ELECTRIC INCUBATOR Filed July ll, 1946 5 Sheets-Sheet 1 glu/venian 4 7%5 MJ/Zim May 10, 1949. J. w, NAPIER 2,470,046

ELECTRIC INCUBATOR Filed July 11, 1946 5 Sheets-Sheet 2 www' May 10, 1949. J. w, NAPIER 2,470,046

ELECTRIC INCUBATOR 5 Sheets-Sheet 5 Filed July 11, 1946 flames 7l? A51/:ier

Patented May l0, 1949 l www@ STATES @MEN-fr .cm-Fmi'.

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canile tweenthembeing 'the eggs which are in the 'I'he resistance wire i-l is wound in a dat nattern equidistant-from the licor plate. lil at all points. the windings being so spaced as to distribnte the heat substantially uniformly over the entire licor area. To obtain this result the sides adjacent the outlying regions ot the heater chamber may be spaced more closely than those adjacent the middle. The wire i1 is ofV such resistanco characteristics that it does not glow when heated. In fact, its temperature is not greatly in excess or the controlled temperature ci the incubating chamber. n rise oi' the temperature in the incubating chamber after the heating element has been cui: oit by the thermostat. due to excess heat stored in the heating element. one of the prominent features of the invention is the location ot 'the thermostat in a chamber extraneous to the incubating chamber. ret responsive to the temperature of the incubating chamber through the common metal licor plate i that divides said chambers. This affords maximum protection to the thermostat.

Figure 2 shows the incubator with the cover closing the cabinet 2. The cover is preferably composed or two layers 2a and 2B od board 'or suitable material, the layer 28 resting upon the top ot the vertical sides of the cabinet 2, while the layer 29 tits within the cabinet. These-two layers are secured together, the interface becovered with s nlm 80 of aluminum paint enhance the thermal insulation of the incubating chamber. The cover has a central hole Il, which is the outlet o! the ventilation system. The heater element sets' lill a convection current. Air enters the heater chamber Il. through the bottom hole i3. becomes warmed, and passes through the passages I4. ci' which there are several on three sides.

.into the incubating chamber at the periphery thereof, and out through the hole Si in the center. The hole 8i also serves as a inlet i'or the `introduction ci humidliying water. as will appear. An egg rack rests freely upon the door plate III. It-

oonslsts oi e Fliure 5, the oi parallel spwed slots dinally of the incubating native construction of egg ure 9. in which a frame lll supporting trame 3i. best shown in upper tace oi which carries a eries u, extending longituchamber. An alterrack is shown in Figsupports a sheet Il of hardware cloth.

On top of the with is the egg egg rack and cooperating thereturner. shown in Figure '1. It

-oomprises a rectangular trame 35. about es wide as the incubating chamber, but somewhat shorter so that it can be reciprocated lengthwise within the incubating chamber. it has cross partitions 86, extending widthwise at intervals, which denne hottomless egg troughs 31'. The side of the cabinet 2 has a hole 88. 'through which a handle 3B freely extends, said handle being attached to the corresponding side of the egg turner. By means of the handle the egg turner may be reciprccated upon the egg rack 1n a longitudinal direction with respect to the slats 34, turning upon said slats.

The egg turner carries a humidifier 42. or such size that it is always under the hole 3i in the cover, regardless of the position of the egg turner. It comprises a frame 43, supported in elevated position with respect to the egg turner by the blocks 44. which rest upon certain of the cross This prevents continuedA egg trough al resting` 4 A sheet oi' textile fabric 65. prete ture, is suspended across the frame i3 in somewhat slack state. so saturated with a imaniziinf of water. The water is introduced through the hole Si. It wete both sides of the fabric, presenting an extended wet surface from which water is evaporated into the e-aid surrounding walls and being sup ported thereby. dividingsaid cabinet into lower and upper chambers. a system ci battons secured to said bottom including Opposite pairs convera iioor of spaced slats out of partition. and a rectangular reciprocable egg turning frame slidable upon said slat licor. being shorter than the interior or said cabinet in the 'direction o! its reciprocation and having an operating handle extendlng freely through a hole in an end'wall ot said cabinet. said bottom and top having central Ventilating holes. and at least one of said surrounding walls having bi-p 1 placing said lower and upper chambers into communication.

2. Electric incubator as claimed ln claim 1, said back wail having a removable section above the level of said sheet metal partition.

3. Electric incubator as claimed in claim l, said egg turning frame having` trsmverse partltions defining egg troughs, and a humidiner supported by said frame and movable therewith. said humldiiier including a sheet of absorptive cloth disposed substantially horizontal beneath Number the central hole in the top. 1,029,537 JAMES W. NAPIER.. 1,127,021 1,258,037 REFERENCES CITED 5 1,330,721 The following references are of record in the 15451532 le of this patent: 116151464 1,617,920 UNITED STATES PATENTS 1,808,306 Number Name Date 10 1,341,723 320,463 cutting June 23,1385 1,943,575 312,824 Coburn Feb. 20, 190e 2,984,832 840,498 Kemer Jan. a, 190'? 2,193,370 916,454 Kocns Mar. 30, 1909 2,240,625

6 Name Date Ford June 11, 1912 Klett, Feb. 2,1915 Nelson Mar. 5, 1918 Riddle Feb. 10, 1920 Grant Feb. 13, 1923 Marsden Jan. 25, 1927 Miller Feb. 15, 1927 Johnson June 2, 1931 Folsom Jan. 19. 1932 Abendroth Jan. 16, 1934 Blaschke June 22, 1937 Kocher Mar. 12, 1940 FitzMaurice May 6, 1941 

